— Travel-size toiletries: toothpaste, sunscreen, deodorant, mouthwash, lotion, antibacterial wipes, hand sanitizer, lip balm, perfume, tissues. Gift a Birchbox subscription for $10 a month and the recipient will get five samples of personal care and beauty products per delivery for hair, skin and style, all in TSA-compliant sizes for carry-on liquids and gels not exceeding 3.4 ounces.
— Toiletry bag that can be hung up upon arrival.
— Tennis ball-size T Spheres, aromatherapy-massage balls, can be heated or frozen, $35.
— Soaragami armrest divider, $30. Have fun explaining it to the stranger on the plane sitting next to you in coach.
— Travel yoga mats.
— Inflatable Ten Toes stand-up paddleboard, $500 and up.
— Bike helmets that fold flat. Morpher helmets are certified safe in the United States and Canada by the Consumer Product Safety Commission, $149.